I held my camera tripod in both hands to form a barrier as the bear rushed into me.

熊冲向我时，我双手拿着相机三脚架形成了一道障碍。

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A tripod will be useful to align and steady the camera.

三脚架会有助于对齐稳住照相机。

《柯林斯英汉双解大词典》

Position camera on tripod and prefocus on inside of tank.

把相机固定于三脚架，预先对水缸内部调焦。

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